Techline Connect (GM/ACDelco) and Used Modules
I had to call ACDelco Tech Support today to troubleshoot an issue I was having trying to flash a 1998 Corvette PCM, and I was told two interesting (and troubling) pieces of info that I was previously unaware of.
- Techline Connect will not write a new VIN to a donor module. The tech that I spoke with said that the engineers briefed them that flashing a donor module is possible, but that the software will not permit a new VIN to be written if it had previously been programmed to a vehicle.
- Techline Connect struggles to correctly interact with pre-2009 systems, requiring temporary permission to use the old TIS2Web system (which is now just hidden). After calling in and confirming that Techline would be able to handle my ‘98 Corvette this morning, the T2 tech said it couldn’t do it and then had to get their Web team involved to allow me to access TIS2Web via the same old Web-based method.
Especially with regards to VIN re-writes, I confirmed with the tech on the phone several times and she was consistent in her answer.
Hi Kyle, This is becoming a bigger problem all the time. They own the intellectual properties and are actively phasing out support for older vehicles all the time. This is happening all across the industry and not just with GM. Besides that, rewriting a VIN in a PCM gets into federal transportation regulation limitations from what I understand.
Hi. I just used tech line yesterday to install a used pcm in a 06 Malibu. I made sure I had the OBD connector unplugged when it tried to query the car so it wouldn't lock my vin purchase. I entered the VIN manually and when I got to the flash it came up with a warning that the VIN does not match. But it gave me two options. Continue and use the VIN in the module, or override and use the VIN I…
I use that trick to rewrite modules that can't be programmed again (has the lastest calibration file). Unplugging OBD made it look like a blank module, then plug it in to program the module.
hi scott question, how do u leave obd connector out ,when ac delco pulls up all ur j2534 device ,doesn't the flash device have to be plugged in for power in order for it to continue I use mostly use autel or do u have to disconnect it after techline reads ur device? thanx for sharing I have been looking for this info thank you
I use a snap on passthru pro 4 and it gets enough power from the USB port to keep active so the software sees it.
Good to know. I do the same for Ford. Just disconnect for the short time when it is querying the module and it thinks it is blank and allows a new vin and flash.
We do used modules all the time and did an 04 and 06 this week. I have the annual sub, maybe it’s the per vin one that’s having issues. Ive had TLC for 2 years and have yet to have a car it wouldn’t do that wasn’t a GDS car I was trying to sneak a used module in. Last week on an 09 I had to call and get them to add the engine data that wasn’t there but that was an occasional issue before too. I…
My company does mobile programming in the metro Detroit area. We do used modules consistently with TLC and many other manufacturers. What it is coming down to is the tech line is being told that it cannot be done. They do not want the tech line tied up trying to program used modules. TLC does in fact struggle with pre 2009 vehicles. Here is my suggestion, Keep your old tooling that worked for…
I understand your struggles with SPS2. I have been on the phone countless hours since the launch. I have been programming GM’s since they sent DVD updates and have never used the help center other than a password reset. Used modules will work if you enter the VIN manually for a session. Make sure you are not connected to the vehicle but connected to your programming device. Wait until the last…
“Techline Connect will not write a new VIN to a donor module. ” This is not true if we're talking across the board. Only specific things. I just did a used ecm on a 12 Malibu not long ago and vin rewrote no problem.
TLC has no real issues rewriting a CAN module, but has issues with slower speed modules, not on the CAN bus…at least that has been my experience since the rollout. A 12 Malibu is CAN, therefore it should go fine.
My business does mobile programming in the Myrtle Beach area. I do a few GM used modules but do not guarantee they will work. Many times I have the modules sent to the shop and have been able to program some on the bench. I am just starting this process to see what the demand is. I agree with many on here that it can be done just don't connect to the vehicle until the last possible moment. It…